Exquisite workmanship, feeling fine, easy to use. Unique thread design, effectively and directly to make bicycle braking. Fit for: bike,bicycle. Type:flange adapter Color:silver Material:aluminium alloy Weight:19g Size: Hole distance of 48mm, an inner diameter of 34mm(approx) Hole distance of 44mm, an inner diameter of 34mm(approx) Package includes:1 flange adapter